I have win 10 on my laptop. Surprisingly, it is 2 months that I can not open some of the websites on my laptop with any browser (Chrome, IE, Firefox, ...), especially the website of universities, even if I type the IP address of the website.
The problem is not form my internet provider because I can load those websites from my mobile via my WiFi (Not my sim-card's internet). Also I can open the websites from Ubuntu inside of a virtual box in my windows. The problem is not from firewall because I disable that and I had the problem again.
I think 2 possibilities may happen.
1- My laptop have some kind of virus, and it prevent visiting universities websites.
2- The windows can not find the DNS server for those websites. When I type ping www.the_intended_website.com it shows the correct IP address for those websites but the response failed because of timeout.
Any suggestion for solving this problem is appreciated.